<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="style.css">
</head>
<body>
<!-- 按钮*4 -->
<a href="#">
    <!-- 四个边框，进行边框渐变环绕 -->
    <span></span>
    <span></span>
    <span></span>
    <span></span>
    Neon Button
</a>
<a href="#">
    <span></span>
    <span></span>
    <span></span>
    <span></span>
    Neon Button
</a>
<a href="#">
    <span></span>
    <span></span>
    <span></span>
    <span></span>
    Neon Button
</a>
<a href="#">
    <span></span>
    <span></span>
    <span></span>
    <span></span>
    Neon Button
</a>
</body>
</html>
